Special Section on Quantum Dots

Integrated photonics using colloidal quantum dots

[+] Author Affiliations
Vinod M. Menon, Saima Husaini, Nicky Okoye, Nikesh V. Valappil

Queens College of the City University of NY, Department of Physics, 65-30 Kissena Blvd, Flushing, NY 11367

J. Nanophoton. 3(1), 031608 (November 13, 2009). doi:10.1117/1.3271386
History: Received May 11, 2009; Revised November 3, 2009; Accepted November 4, 2009; November 13, 2009; Online November 13, 2009
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Abstract

Integrated photonic devices were realized using colloidal quantum dot composites such as flexible microcavity laser, microdisk emitters and integrated active-passive waveguides. The microcavity laser structure was realized using spin coating and consisted of an all-polymer distributed Bragg reflector with a poly-vinyl carbazole cavity layer embedded with InGaP/ZnS colloidal quantum dots. These microcavities can be peeled off the substrate yielding a flexible structure that can conform to any shape and whose emission spectra can be mechanically tuned. Planar photonic devices consisting of vertically coupled microring resonators, microdisk emitters, active-passive integrated waveguide structures and coupled active microdisk resonators were realized using soft lithography, photo-lithography, and electron beam lithography, respectively. The gain medium in all these devices was a composite consisting of quantum dots embedded in SU8 matrix. Finally, the effect of the host matrix on the optical properties of the quantum dots using results of steady-state and time-resolved luminescence measurements was determined. In addition to their specific functionalities, these novel device demonstrations and their development present a low-cost alternative to the traditional photonic device fabrication techniques.

© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Vinod M. Menon ; Saima Husaini ; Nicky Okoye and Nikesh V. Valappil
"Integrated photonics using colloidal quantum dots", J. Nanophoton. 3(1), 031608 (November 13, 2009). ; http://dx.doi.org/10.1117/1.3271386


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